The center of modified cardiac muscle fibers in the wall of the right atrium that acts as the pacemaker for the heart rhythm

Sinus Rhythm

systole

Greek Contraction Contraction of the heart muscle

147

Systol

RootSystole, contraction

148

Ic

SuffixPertaining to

149

Systolic

Root + SuffixPertaining to systole

150

Vital Signs

Vital Latin LifeSigns Latin MarkA Procedure during a physical examination in which temperature, pulse, respirations and blood pressure are measured to assess general health and cardiorespiratory function